Dell PowerEdge 2950 and disk compatibility

Hi,

We have 2 Dell PowerEdge 2950 servers, both with a Perc 6 raid controller, 2 72Gb SAS drives and 2 2tb SATA drives. We were planning to extend the storage at the servers from 4Tb in raid 0 to 4 Tb in raid 1, so we managed to get 4 drives of 2Tb. Only one of those 4 drives is recognized as a 2Tb SATA disk, this disk is a Constellation ES with FW PA03.

The other 3 disks are Constellation ES.3 with firmware GA04, and are recognized as 136Gb SAS drives.

Is there any way to upgrade the servers so they will recognise the 3 disks as an 2TB SATA disk?

Thanks in advance!